<!DOCTYPE html>
<html>
<head>
	<title>广告</title>
	<meta charset="utf-8"/>
	<style type="text/css">
		*{
			padding: 0;
			margin: 0;
		}
		body{
			height: 1600px;
		}
		#f{
			position: absolute;
			top: 3px;
			left: 5px;
			position: fixed;

			width: 180px;
			line-height: 200px;
			background: red;
			/*position: fixed;
			top: 200px;
			left: 15px;*/
		}
		#s{
			position: absolute;
			top: 0;
			right: 5px;
			width: 180px;
			line-height: 200px;
			background: red;
			/*position: fixed;
			top: 10px;
			right: :20px;*/
		}
	</style>
</head>
<body>
	<div id="f">广告1</div>
	<div id="s">广告2</div>
</body>
</html>